fix position of focused search in inverse navbar

[moesalih]

When the search field in inverse navbar is focused, a small jump is size
is noticable. This is due to changing the border and padding which is
unnecessary.

[travisbot]

This pull request passes (merged 5e3d94b into afd9312).

[moesalih]

The issue can be seen in the bootstrap docs (http://twitter.github.com/bootstrap/components.html#navbar) under the Inverted variation section. Just select the search field and unselect it and you'll see the 1-pixel jump in size.

[mdo]

I see no jumping. What browser?

[moesalih]

I tested latest Firefox and Chrome and It happens in both. It's a subtle 1-pixel increase in size, and just looks a little weird.

If you want to see what this fix does, just disable the border and padding properties in the developer tools, and select/unselect the field, you'll see that it looks a little better.

[mdo]

The focused state is removing the border and increasing the padding, by 1px on all sides. It's an intentional change and one we'll keep for the time being.